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firmware: xilinx: Add system shutdown API interface

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Add system shutdown API interface which asks firmware to
perform system shutdown/restart.

Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Jolly Shah <jolly.shah@xilinx.com>
Link: https://lore.kernel.org/r/1587761887-4279-24-git-send-email-jolly.shah@xilinx.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Rajan Vaja 2020-04-24 13:58:05 -07:00 committed by Greg Kroah-Hartman
parent ae5c961da6
commit fdd2ed88ca
2 changed files with 19 additions and 0 deletions
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13
drivers/firmware/xilinx/zynqmp.c
View File

@ -875,6 +875,19 @@ int zynqmp_pm_aes_engine(const u64 address, u32 *out)
}
EXPORT_SYMBOL_GPL(zynqmp_pm_aes_engine);
/**
* zynqmp_pm_system_shutdown - PM call to request a system shutdown or restart
* @type: Shutdown or restart? 0 for shutdown, 1 for restart
* @subtype: Specifies which system should be restarted or shut down
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_system_shutdown(const u32 type, const u32 subtype)
{
return zynqmp_pm_invoke_fn(PM_SYSTEM_SHUTDOWN, type, subtype,
0, 0, NULL);
}
static ssize_t ggs_show(struct device *device,
struct device_attribute *attr,
char *buf,

6
include/linux/firmware/xlnx-zynqmp.h
View File

@ -64,6 +64,7 @@
enum pm_api_id {
PM_GET_API_VERSION = 1,
PM_SYSTEM_SHUTDOWN = 12,
PM_REQUEST_NODE = 13,
PM_RELEASE_NODE,
PM_SET_REQUIREMENT,
@ -340,6 +341,7 @@ int zynqmp_pm_write_ggs(u32 index, u32 value);
int zynqmp_pm_read_ggs(u32 index, u32 *value);
int zynqmp_pm_write_pggs(u32 index, u32 value);
int zynqmp_pm_read_pggs(u32 index, u32 *value);
int zynqmp_pm_system_shutdown(const u32 type, const u32 subtype);
#else
static inline struct zynqmp_eemi_ops *zynqmp_pm_get_eemi_ops(void)
{
@ -482,6 +484,10 @@ static inline int zynqmp_pm_read_pggs(u32 index, u32 *value)
{
return -ENODEV;
}
static inline int zynqmp_pm_system_shutdown(const u32 type, const u32 subtype)
{
return -ENODEV;
}
#endif
#endif /* __FIRMWARE_ZYNQMP_H__ */